JPH0541859Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a seal ring manufacturing apparatus.

[Prior art] Generally, when manufacturing seal rings such as O-rings, raw rubber materials such as extruded strings and ring bodies (ring bodies called "so-called Barwell rings") are placed in the lower mold of the mold member for molding. Fit them one by one into the ring-shaped groove for forming the seal ring, and then
The upper and lower molds of the molding mold member are brought close to each other,
After heating and vulcanizing the seal ring molding material to form a seal ring, the upper and lower molds are separated from each other, and the seal rings attached to the upper mold or the lower mold are removed from the mold one by one. was.

[The problem that the idea attempts to solve]

With conventional equipment, the raw rubber materials must be fitted into the grooves one by one, and the molded seal rings must be removed one by one from the upper mold or the lower mold, which is difficult for the operator. This was extremely troublesome and required a considerable amount of time.

Therefore, an object of the present invention is to provide a seal ring manufacturing apparatus that improves work efficiency and facilitates work.

[Means to try to solve the problem]

In the seal ring manufacturing apparatus of the present invention, a thin holding plate holding a ring-shaped raw rubber material at the peripheral edge of a through hole is supplied between upper and lower molds, and the raw rubber material is is vulcanized, and a molding die member in which a seal ring portion with the outer scrap attached to the retaining plate is formed;
A seal ring manufacturing apparatus comprising: a plurality of the above-mentioned molding mold members arranged at equal pitches around the circumference so as to rotate intermittently at a constant angle at a constant cycle along the circumferential direction; A holding plate feeding member is disposed in the vicinity of the rotary press portion to form a rotary press portion, and to sequentially move the holding plate holding the raw rubber material closer to one of the mold members for molding. Further, a holding plate supplying member for supplying a holding plate close to the molding die member between the upper and lower molds of the molding die member is interposed between the rotary press section and the holding plate feeding member. It is something.

[Effect]

The vulcanized seal ring part is attached to the holding plate, so if the holding plate is taken out from the molding mold member, the seal ring part can be taken out from the molding mold member, which is different from the conventional method. This eliminates the need to remove each seal ring one by one from the upper mold or the lower mold.

In addition, as the holding plate holding the raw rubber material approaches one of the plurality of mold members one after another, and the holding plate is supplied to the mold member, a large number of seals are produced. Rings can be manufactured in a short time.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the seal ring manufacturing apparatus according to the present invention. a rotary press section 33 arranged in an annular shape, and one of the plurality of mold members 3 for molding.
As shown in FIG. The raw rubber material 2 is vulcanized and molded in the upper and lower molds 4 and 5, as shown in FIGS. 2 and 5. A seal ring portion 6 is formed with the outer scrap 28 attached to the retaining plate 1.

As shown in FIG. 2, the holding plate 1 is provided with a plurality of through holes 7..., and the raw rubber material 2 is secured to the peripheral edge 8 of the through holes 7. 2 is held on the holding plate 1. That is, a plurality of protrusions 9 are formed at predetermined intervals along the circumferential direction on the outer peripheral surface 13 of the raw rubber material 2, and as shown in FIG. The raw rubber material 2 is held by the holding plate by elastic pressure contact.

Further, this ring-shaped raw rubber material 2 is an example of a so-called "Burwell rubber band", and as shown in FIG. 10, a raw rubber cylinder 10 is formed using an extruder.
The cylindrical body 10 is manufactured by slicing the cylindrical body 10 into rings having a predetermined thickness. On the outer peripheral surface 11 of this cylindrical body 10, a longitudinal protrusion 12 having a triangular cross section is provided.
... are provided protrudingly, and when the cylindrical body 10 is cut into rings to form the ring-shaped raw rubber material 2, protrusions 9 having a triangular cross section are formed on the outer circumferential surface 13.

Next, the lower mold 5 of the mold member 3 is assembled as shown in FIG.
As shown in FIG. 4, a large number of ring-shaped grooves 14 are formed on the upper surface, and small ring-shaped grooves 15 and 16 are formed on the inside and outside of the grooves 14, as shown in FIG. Grooved. Further, the inner surface 17 within the groove 14 is slightly higher than the outer surface 18. and,
A holding plate 1 with a raw rubber material 2 is placed on this lower mold 5. In this state, the upper surface 19 of the holding plate 1
and the inner surface 17 are at the same height. That is, the inner surface 17 is higher by the thickness dimension A of the retaining plate 1. Also, as shown in Figures 3 and 4,
The diameter of the through hole 7 of the holding plate 1 is set larger than the outer diameter of the groove 14 and smaller than the outer diameter of the small groove 16. In the embodiment, the holding plate 1 is made of a thin polished plate made of metal such as stainless steel or aluminum and has a thickness A of 0.3 to 0.5 mm. When the holding plate 1 is placed on the lower mold 5 with the holding hole 22 penetrated, the dowel pin 21 protruding from the upper surface 20 corner of the lower mold 5 is inserted into the hole 22 and the holding plate 1 is inserted into the hole 22. The position of the plate 1 is determined, and the raw rubber material 2 is set to accurately correspond to the groove 14.

Further, as shown in FIG. 4, the upper mold 4 of the mold member 3 has a ring-shaped groove 24 recessed in the lower surface 23, and ring-shaped small grooves on the inside and outside of the groove 24. 25 and 26 are recessed. Then, as shown in FIG.
4 face each other, forming a ring-shaped hollow portion having a circular cross section.

Therefore, after placing the holding plate 1 holding the raw rubber material 2 on the lower mold 5, the upper and lower molds 4 and 5 are brought close to each other, as shown in FIG.
Holding plate 1 is sandwiched between 5 and 5, and upper and lower molds 4 and 5 are heated to form raw rubber material 2...
After forming the seal ring part 6 by vulcanization molding, the upper and lower molds 4 and 5 are separated from each other, and the second
As shown in the figure, the holding plate 1 is taken out from the mold member 3.

During vulcanization molding, a ring-shaped seal ring part 6 is formed in the hollow part formed by the grooves 14 and 24, but the raw rubber of the raw rubber material 2 protruding from the hollow part is It flows into the inner hollow part formed by the grooves 14 and 25 and the outer hollow part formed by the small grooves 16 and 26, and as shown in FIG. 5, ring-shaped inner and outer scraps 27 and 28 are formed. is formed. Moreover, this outer scrap 28 is attached to the retaining plate 1.
It will be attached to the peripheral edge 8 of the through hole 7.

Therefore, when the holding plate 1 is taken out from the mold member 3, the seal ring portion 6 can be taken out from the mold member 3 while being held by the holding plate 1. Then, by separating the inner and outer scraps 27 and 28, a seal ring is formed as a product.

Therefore, the mold member 3 formed as described above...
The rotary press section 33 in which... are arranged in an annular shape rotates the mold member 3 intermittently at a constant angle in a constant cycle along the circumferential direction, and for example, It includes a rotating body 39 that rotates each mold member 3 along the circumferential direction, and a control mechanism (not shown) that controls the rotation. That is, the control mechanism controls the rotation of the rotating body 39, thereby controlling the rotation of each mold member 3.... In this case, the direction of rotation of each mold member 3 is the direction of arrow X (that is, counterclockwise).

Specifically, each mold member 3 has 6 parts at a pitch of 60°.
The mold members 3 are rotated at regular intervals. In this one movement, the mold member 3 that was at the position A becomes the position F, the mold member 3 that was at the F position becomes the position E, and the mold member 3 that was at the E position moves to the F position. 3 is at position D, the mold member 3 that was at position D is at position C, the mold member 3 that was at position C is at position B, and the mold member 3 that was at position B is now at position C. It will be in position A. below,
It moves sequentially at regular intervals.

In addition, the holding plate feeding member 34 is composed of a conveyor or the like on which a plurality of holding plates 1... are placed, and each holding plate 1... is shaped like an ellipse in a plan view as shown by an imaginary line. move along the trajectory of and,
The holding plate 5 holding the raw rubber material 2 is sequentially brought closer to one of the mold members 3 for molding (that is, the mold member 3 at position A). Specifically, in the illustrated example, when the mold member 3 located at position A and position B arrive, the holding plate 1 located at position a and position b are sent. Thereafter, when each mold member 3 comes to position A in sequence, each holding plate 1 comes to position a.

Next, the holding plate supply member 35 is a plurality of suction pads that are interposed between the rotary press section 33 and the holding plate feeding member 34, and vacuum-suction the holding plate 1, as shown in FIG. 36..., a part mounting frame 37 for holding the part 36..., etc., and the retaining plate 1 that has come to the position a is sucked by the suction suction part 36... In this state, the mounting frame 37 is moved in the direction of the arrow using a transfer device (not shown) and is supplied between the upper and lower molds 4 and 5 of the mold member 3 at position A, as shown in FIG. After placing the holding plate 1 on the lower mold 5 so that the raw rubber material 2 corresponds to the groove 14 of the lower mold 5, the holding of the holding plate 1 by the suction pad 36 is released. After that, it escapes from between the upper and lower molds 4 and 5. In this case, the suction pad 36...
... are arranged so as not to adsorb each raw rubber material 2... in contact with each raw rubber material 2... when the holding plate 1 is adsorbed.

Therefore, if the holding plate 1 with the raw rubber material 2 is supplied to the mold member 3 at the position A, when the mold member 3 rotates and comes to the position B, as shown in FIG. The seal ring portion 6 with the outer scrap 28 attached thereto is vulcanized and molded. At this position B, the upper and lower molds 4 and 5 are separated, and the holding plate 1 is taken out from the mold member 3 as shown in FIG. And after that,
The inner and outer scraps 27, 28 are separated from the seal ring portion 6 and the seal ring is taken out as a product, and the retaining plate 1 is cleaned of dust and the like. Here, the holding plate 1 is taken out from the mold member 3 using a holding plate taking-out member 38 equipped with suction pads 36 similar to the above-mentioned holding plate supplying member 35. In addition, the removed holding plate 1 is directly
The seal ring is placed on the feeding member 34, and the seal ring is taken out and the retaining plate 1 is cleaned of dust and the like on the feeding member 34. In this case,
The removed holding plate 1 is placed on a transport device such as a conveyor that is separate from the feeding member 34, and on that placement work is performed to take out the seal ring or remove dust from the holding plate 1, and then It is also preferable that the holding plate 1 is placed on the feeding member 34.

Note that the holding plate 1 on which the raw rubber material 2 is not held is moved by this feeding member 34 until it reaches the position a.
Raw rubber material 2 stored on a nearby shelf, etc.
... is held in each through hole 7.... Note that the upper and lower molds 4 and 5 of the mold member 3 from which the holding plate 1 is taken out at position B are cleaned by brushing, air blowing, etc. before reaching position A.

Therefore, according to this device, when the mold member 3 at position A moves sequentially in the direction of arrow is formed. That is, a large number of seal ring portions 6 are sequentially formed at regular intervals to form a seal ring as a product.

Therefore, in this device, mold members 3 having different ring-shaped hollow parts formed by the upper and lower molds 4 and 5 are used, and different seal rings are sequentially formed. . Therefore, there are six types of holding plates 1 corresponding to the mold members 3.
At least two of each type are required. Barefoot,
After the holding plate 1 is taken out at position B, the next move will be to position A, so during that time, the work of taking out the seal ring and installing the raw rubber material 2 into each through hole 7 are carried out. This is because it is necessary and difficult. In other words, if you have two
While one holding plate 1 is being used and coming from position A to position B, the work of taking out the seal ring of the other holding plate 1 or installing it into each through hole 7 of the raw rubber material 2... can be done.

Moreover, of course, all the mold members 3 have the same hollow part.
You are free to use a mold member 3 that is partially the same as the mold member 3.

Next, FIGS. 7 and 8 show another example of the raw rubber material 2, in which the raw rubber material 2 is made of a string-like body formed by extrusion molding or the like, and both ends 2
9 and 30 are brought into contact with each other to form a ring shape as shown in the figure, and as described above, the peripheral edge 8 of the through hole 7 of the holding plate 1 is
hold it. That is, this string-like body has a substantially elliptical or circular cross section with flat ribs 31 protruding from its outer peripheral surface, and the outer flange 31 fits into the through-hole 7 of the holding plate 1.
This raw rubber material 2 is held by the holding plate 1. Note that the shape of the rib 31 may be any shape as long as it engages with the peripheral edge 8 of the through hole 7 of the holding plate 1, so for example, the shape of the rib 31 may be triangular in cross section,
It may be of various shapes such as a trapezoidal shape, or may be discontinuous when viewed from above.

In addition, as the raw rubber material 2, protrusions 9 and ribs 3
It may be ring-shaped without 1. That is, the outer diameter size may be set slightly larger than the hole diameter size of the holding plate 1, and the holding plate 1 may be fitted into the through hole 7 while being elastically deformed.

Therefore, in FIG. 9, along the circumferential direction of the through hole 7,
The holding plate 1 is shown having a large number of triangular projections 32 projecting inward, and the diameter D of the tips of the projections 32 is slightly smaller than the outer diameter B of the raw rubber material 2. It is set. Therefore, when this holding plate 1 is used, the raw rubber material 2 only needs to be secured to the projections 32, so there is no need to form the projections 9 or ribs 31 on the raw rubber material 2. Further, it is preferable that the projections 32 have various shapes such as a rectangular shape, and the number thereof is also arbitrary.

Note that the present invention is not limited to the illustrated embodiment,
The design may be changed without departing from the gist of the present invention; for example, the number of mold members 3 of the rotary press section 33 may be increased or decreased, and in the illustrated example, the outer surface 18 of the lower mold 5 is It is considered to be lower than 17,
In addition, the lower surface 23 of the upper mold 4 is set so that there are no high and low parts other than the groove 24 and the small grooves 25 and 26, but conversely, the upper surface 20 of the lower mold 5 has no high and low parts. First, it is also possible to form high and low portions on the lower surface 23 of the upper mold 4. Alternatively, the upper surface 20
It is also possible to form high and low parts on both the lower surface 23 and the lower surface 23 to reduce the thickness of the holding plate 1. In short, when the mold member 3 is in the pressed state shown in FIG. It is sufficient that the upper surface of the holding plate 1 is brought into contact with the lower surface 23 of the upper mold 4 at the same time as the upper surface of the holding plate 1 is brought into contact with the outer surface 18 of the upper mold 4 . Further, although the formed seal ring portion 6 is shown as an O-ring with a circular cross section in the illustrated example, it can be freely applied to various cross sections other than this. Further, the holding plate supplying member 35 does not have to be equipped with the suction pad 36, but may be one that suctions with a magnet or the like.

[Effect of idea]

Since the present invention is configured as described above,
This produces the following effects.

By removing the holding plate 1 from the mold member 3, the vulcanized seal ring portion can be taken out from the mold member 3, which eliminates the need to remove them one by one as in the past, making the work extremely easy. At the same time, the working time can be shortened. moreover,
Since the holding plate 1 holding the raw rubber material 2 is sequentially supplied to the mold member 3, a large number of seal rings can be formed in a short time, resulting in extremely high productivity.

[Brief explanation of drawings]

Fig. 1 is a simplified plan view showing one embodiment of the present invention, Fig. 2 is an enlarged perspective view showing the vulcanization molding process using a mold member, and Fig. 3 shows that the holding plate holding the raw rubber material is in the lower mold. Enlarged plan view of the state placed on the 4th
The figure is an enlarged sectional view of the same main part, Fig. 5 is an enlarged sectional view of the holding plate taken out from the mold member, Fig. 6 is an enlarged side view of the holding plate supply member, and Fig. 7 is an enlarged sectional view of the holding plate taken out from the mold member. A sectional view of the main parts of the embodiment, FIG. 8 is a plan view of the same,
FIG. 9 is an enlarged plan view of the main parts of another embodiment of the holding plate;
FIG. 10 is a perspective view showing an embodiment of a method for producing a raw rubber material. DESCRIPTION OF SYMBOLS 1...Holding plate, 2...Raw rubber material, 3...Mold member, 4...Upper mold, 5...Lower mold, 6...Seal ring portion, 7...Through hole, 8...Periphery Part, 28...
...Outer scrap, 33...Rotary press section,
34... Holding plate feeding member, 35... Holding plate supplying member.

Claims (1)

[Scope of Claim for Utility Model Registration] A thin holding plate holding a ring-shaped raw rubber material at the peripheral edge of a through hole is supplied between upper and lower molds, and the raw rubber material is A seal ring manufacturing apparatus comprising a mold member for forming a seal ring portion with an outer scrap attached to the holding plate by vulcanization molding. The mold members are arranged at equal pitches around the circumference so as to rotate intermittently at a constant angle at a constant cycle along the circumferential direction to form a rotary press part, and the raw rubber material is held. A holding plate feeding member is disposed near the rotary press section for sequentially moving the holding plate closer to one of the molding die members, and further moving the holding plate closer to the molding die member to the molding die member. A seal ring manufacturing apparatus characterized in that a holding plate supplying member for supplying between the upper and lower molds of a mold member is interposed between the rotary press section and the holding plate feeding member.